🚀 go-pugleaf

I dont know the reason, but when I want to create an object in my VCL
console mode APP, I get the     'Undefined Symbol 'TTable'

I tested with  TQuery* Q1; and TTable *Table; and I get this error. My
includes are
What is the problem??

#include <vcl.h>
#include <condefs.h>
#include <db.hpp>
#pragma hdrstop

//--------------------------------------------------------------------------
-

#pragma argsused

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Hi Mario,

"Mario P�rez" wrote:

> I've made a console application wich read a paradox table and it seems to
> work fine. But after a long time of no utilization, application fails to
> open the table. I must open any VCL-based application and open any table,
> and then my console application works fine again. It seems like if BDE shuts
> down and any action is required in order to restart it...
>
> This is the source code of my program (that I use as CGI). The code has been
> simplified a lot:
>

OK, here are my comments/thoughts

>
> ------------------------------------------------
> int main(int argc, char* argv[])
> {
>   TTable *Table;
>   TForm *Form;
>
>   Application->Initialize();
>   Form=new TForm(Application);

There is no need to create a form as the owner of the TTable, NULL will do fine,
as long as you delete it after finishing.


>
>   Table=new TTable(Form);
>

>
>   Table->DatabaseName="c:\\myData";
>   Table->TableName="myTable.db";
>   Table->Active=true;
>   Table->First();
>
>   AnsiString out=Table->FieldValues["myField"];
>   printf("First myField value: %s",out.c_str());
And speaking of delete, I'm really hoping that there is a line like "delete
Form" in the real code.
If not, the Form is not getting released properly, and therefore the Form is not
releasing the Table.
So you may be blowing the BDE by creating many TTables and never deleteing them
properly.
There are probably resources allocated by the BDE for each connection that are
left around until something cleans them up (like your VCL app?) .

>
>   return 0;
> }
> -------------------------------------------------
>
> Any suggestions will be appreciated!!!
>

try this - it's going to be more efficient:




int main(int argc, char* argv[])
{

// not sure the following this is required - it only does some OLE stuff
  Application->Initialize();

  TQuery * Query  = new TQuery(NULL);

  Query->DatabaseName = "c:\\myData";
  Query->SQL->Text = "SELECT * FROM  myTable";
  Query->Active = true;
  Query->First();

  AnsiString out = Query->FieldByName("myField")->AsString;
  printf("First myField value: %s", out.c_str());

  return 0;
}


Apologies for syntax errors, and hope this helps


>
> Thank you in advance!!!
>

>
> Mario P�rez
> www.oiram.com

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